Topic: Missing collar from a 1978 CB 750SS F3

[DWS]

Could some answer this for me, i have a 1978 CB750 super sport, and when i was replacing the oil filter and so on, i notice that there is no oil filter washer and or collar.
Is there suppose to be a collar on this bike? If there is, i am have a hard time finding one.
Thanks for your help
Duane

[madmtnmotors]

I replied to your post in the other thread, but here goes again in case you don't see that:

Some pictures would help. The washer helps keep the spring from digging into the rubber on the filter. The washer usually sticks to the filter and gets discarded along with the filter during an oil change. They are cheap and still available from Honda. As for the "collar", the only collar I am aware of is the collar that serves as a spacer where the oil filter bolt passes through the "oil cooler" chunk of aluminum heat sink between the oil filter and the lower crankcase. These auxillary heat sink oil coolers are often removed, especially since they require an additional o-ring, and since every other CB750 works fine without them. They can be removed and a shorter oil filter bolt is used. If you have this oil cooler in place, but do not have the spacer collar, then the spring may not be tensioned properly against the oil filter which could allow unfiltered oil to bypass the filter. Is the oil cooler still in place? If not, then you won't need the collar.

[DWS]

Thanks for answering my post, that clears up my question, i do not have the oil cooler/oil filter base so i must not need the collar, but since i have the F3 model would it not be better to have the oil cooler in there so it helps with cooling the valve's?

[madmtnmotors]

I would think stock motors would be fine without it. If you have one laying around it won't hurt to put it on (with the longer bolt and spacer). I've got over 40,000 miles on my 750F3 (78) in the Florida sun with no issues.

[DWS]

thanks for the help! no i don't have the collar or the base, so i guess the bolt should be the right one, but how long is the short bolt suppose to be? mines 79mm behind the head? Plus when i get some extra cash, i will get a oil cooler kit.

[madmtnmotors]

The filter housing bolt would be standard, if you had the bolt that were used with the cooler the oil filter would be hanging off the crankcase about an inch too far. You would run out of threads on the bolt long before the oil filter seated against the crankcase.